Incandescent electric lamp.



G. P. MODONNELL.

INCANDBSCENT ELECTRIC LAMP. APPLIUATION FILED SEPTI, 1905.

Wbnesses ,lrlvenbow v Q. .m Geolr @F.MSDOnnH Alanya.

, PATENTED Nov. 6 1906.

. -lam improvement in incandescent electric lamps,

y globe into whose neck VportionA is sealed the' wires are arranged with respect to Vthe stem '.wirescan be bent, which bent positionthey- Be it known that I,

NELL, a citizen of las will enableothers whiclr it-'appertains to makeaanduse the tion, in whichv the figure 'joint inlead-wires and be hereinafter described, and afterward point'- ed out in the claims.

.nected to the copper connection theglass UNITED STA' iTTENT OFFICE;

OF si". Louis,l Missionar, AssiGNOR To AMERICAN GEORGE P. ,MonO'NNEii-L,

ELEcTiu-c COMPANY, OF EAST O iiANenfiNEwJERSEY, A CORPORATION OF NEW JERSEY. l 'INCANDESCE- y1' ELECTRIC LAMQ,

, No. 83j4 `,i990.` Specification of Letters Patent, Patented Nov.l A6,1906

.To all whom` itmay concern.:

GEORGE P. MODON- the United- Statesy residing at St. Louis', Missouri, have inventedfa cer- -tain newand useful Improvementin Incandescent'Filectric Lamps, vof* which the follow` y ing isa full, clear, and exact description, such skilled inthe art to will retain and in that manner exertr pressure on the carbon filament tending to hold it in its central osition. Indeed, even though vthe carbon fiianent is res ect to the stem 2-it is esirable to slightly de ect the same by bendin 'the projecting ends of the platinumr wires, ut not so as to disturb their central position,so that .the tension under which Vthe carbon filament is placed b being so deflected. will insure electricai7 contact between the, platinum wire and the carbon filament. It is also desirable to locate the-connection be-v tween the platinum wire and the carbon distant from .theg'lass stem 2, because by so doing the solid end of the glass stem where the ends of the carbon filament are mounted will not be subjected to severe variations in teniperature same, reference being had to the accompanying drawing, forming part of thisspecificarepresents a-sectional View of iny vimproved incandescent electric T is invention .relates to a newand useful the'ob'ect being to dispense with the paste t at is usuallyemployfed betweenfthe,

thel carbon filament. .-Witli this objectin'view the invention consists in the construction, arrangement, ,and combinationofthe several parts, all as will.

or to an intensive heat tend to crack or break the same.

the electric current-.will not pa'ssthrough .thg filament v5 above the eyes of theplatinuin wire, and consequently the filament will not be heated to a state of incandescence in proximit con uctor of' heat will not transmit a sufiif cient vheat to cause the glass mount to crack.

I n the drawing, 1 indicates the bulb or usual filament support or stein 2.

' 3 indicates the co )per inlead-wires, and 4 v the platinum inlcad-wire's electrically conwires 3 and over which constituting the `closed end of the stein 2 is fused.

5 indicates the carbon filament, and 6 the usual anchor wire therefor. c v

In. assembling ltheparts the flanged tube constituting the stem 2.sfused at one end and pressed about the joints between lthe copper Wires 3 and the platinumA wires 4, as usual. At the same time the anchor wire or wires 6 are inserted in the molten lass. The y cnds of the platinum'wires 4 are t ien prefer` ably fornied'with eyes', as shown, and bent to one side. The-fused end of tube 2 is then heated and thc ends of the carbon filament`5 inserted close to the )latinuni wires 4. After the glass is cooledo the eyes of the platinum` over the filament some distance from the fusedend of the lass stem and clam ed -upon the filament. i. Ould the carbon amcnt not. be properly centered 2 the platinum is claimed' as new, and desired t'o be ,secured by Letters Patent, 1s

said inount substantially as deament, and glass constituting scribed. c

' -c 3. In an incandescent vcombination with the bulb and its stem, of a vcarbon filament whose ends are embedded in the ends of said stem,

pro erly centered with f In the construction shown inv-the drawing i to its glass 'mount and being a poor.

Having thus described the invention, whatv l. In an incandescent electric-lamp, the

d in alass mountelectrically con- 7o which would to said carbon filament some dis- '9 electric lamp, the

the ends of said filament; substantially as de l l I rooelectric lamp, the

and inleadwires pass.

- current to said carbon filament, at points remote from the embedded ends thereof, said Wires laterally deflecting said carbon filament so as to make better electrical contact; substantially as described;

A5. In an incandescent electric lamp,' the combination With a glass bulb and its stem,

of aca-rbon filament Whose ends are embedded in said stem, inlead-Wlres assng through said stem adjacent the emgedded` ends of said carbon filament, said inlead-Wires being clamped upon said filament at points dist-ant l from said embeddeavends; substantially as described.-

6. In` an incandescent electric lamp, the combination With aglass bulb and its stem, of a car-bon filament whose ends are embedded in said stem,inleadwires assing through said stem and being forme With-eyes at their extremities which embrace the legs of said carbon filament at points distant from the embedded ends thereof, said rojeeting inlead-Wires being bent so as to effect the legs of said carbon filament; substantially as described.

In testimony whereof I hereunto affix my signature, in the presence of twoiwitnesses, this' 25th day of August, 1905'.

GEORGE P. MODONNELTI.

Witnesses:

` F. R. CORNWALL,

-CORA BADGER. 

